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MDEV-12833 Split Column_definition::create_length_to_internal_length() to virtual methods in Type_handler

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This commit is contained in:
Alexander Barkov
2017-05-17 18:07:20 +04:00
parent 278c3ea756
commit 5b034f1cf8
5 changed files with 185 additions and 84 deletions
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57
sql/sql_type.h
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@ -68,6 +68,7 @@ class Arg_comparator;
struct st_value;
class Protocol;
class handler;
struct Schema_specification_st;
struct TABLE;
struct SORT_FIELD_ATTR;
@ -707,6 +708,28 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
/*
This method is called on queries like:
CREATE TABLE t2 (a INT) AS SELECT a FROM t1;
I.e. column "a" is queried from another table,
but its data type is redefined.
@param OUT def - The column definition to be redefined
@param IN dup - The column definition to take the data type from
(i.e. "a INT" in the above example).
@param IN file - Table owner handler. If it does not support certain
data types, some conversion can be applied.
I.g. true BIT to BIT-AS-CHAR.
@param IN schema - the owner schema definition, e.g. for the default
character set and collation.
@retval true - on error
@retval false - on success
*/
virtual bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *
schema)
const;
virtual bool Column_definition_prepare_stage2(Column_definition *c,
handler *file,
ulonglong table_flags) const= 0;
@ -966,6 +989,15 @@ public:
DBUG_ASSERT(0);
return true;
}
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const
{
DBUG_ASSERT(0);
return true;
}
bool Column_definition_prepare_stage2(Column_definition *c,
handler *file,
ulonglong table_flags) const
@ -1536,6 +1568,11 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const;
uint32 max_display_length(const Item *item) const;
uint Item_time_precision(Item *item) const
{
@ -1830,6 +1867,11 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const;
bool Column_definition_prepare_stage2(Column_definition *c,
handler *file,
ulonglong table_flags) const;
@ -2250,6 +2292,11 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const;
bool Column_definition_prepare_stage2(Column_definition *c,
handler *file,
ulonglong table_flags) const;
@ -2282,6 +2329,11 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const;
bool Column_definition_prepare_stage2(Column_definition *c,
handler *file,
ulonglong table_flags) const
@ -2573,6 +2625,11 @@ public:
Column_definition *c,
handler *file,
ulonglong table_flags) const;
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file,
const Schema_specification_st *schema)
const;
};